Quality Control

Question 0

The closeness between a test reuly and the true value

Answer 0

Accuracy

Question 1

Quality control chart

Answer 1

Levey jennings chart

Question 2

The closeness of test results to one another

Answer 2

Precision

Question 3

A measure of precision or how well the measurement system reproduces the same result over time

Answer 3

Quality control

Question 4

A chart that contains bith bar and line graph

Answer 4

Pareto chart

Question 5

Comparison of the standard deviation of two samples

Answer 5

Coefficient of variation CV

Question 6

The ability to produce more true positive than few false negative

Answer 6

Diagnostic sensitivity

Question 7

For long term accuracy and precision

Answer 7

Interlab

Question 8

For short term quality and precision

Answer 8

Intralab

Question 9

Mislabelling of samples, temperature changes, dirty optics, voltage fluctualtions

Answer 9

Random error

Question 10

Analyses of control sample together with the patient specimens

Answer 10

Intralab

Question 11

Also known as slope or percent error

Answer 11

Proportional error

Question 12

Present in all measurement and causes imperfection

Answer 12

Random error

Question 13

It is independent of sample concentration

Answer 13

Constant error

Question 14

A measure of central tendency

Answer 14

Mean

Question 15

Error due to instruments operator and environmental conditions

Answer 15

Random error

Question 16

A neasure of accuracy

Answer 16

Mean

Question 17

A measure of difference of values from the mean

Answer 17

Standard deviation

Question 18

An index of precision

Answer 18

Coefficient of variation

Question 19

The ability to produce more true negatives than few false positive

Answer 19

Diagnostic specificity

Question 20

Used to determine rederence values

Answer 20

Gaussian curve

Question 21

Uses computer implementation

Answer 21

Cumulative sum graph

Question 22

Difference between the tested value and the target value

Answer 22

Constant error

Question 23

Difference between qc results and the target means

Answer 23

Cusum graph

Question 24

Also known as twin plot

Answer 24

Youden plot

Question 25

A gradual loss of reliability

Answer 25

Trend

Question 26

Control values that can either increase or decrease dor 6 consecutive days

Answer 26

Trend

Question 27

A graphic representation of the acceptable limits of variation

Answer 27

Shewhart levy jennings chart

Question 28

Control values that distribute themselves on one side or either side

Answer 28

Shift

Question 29

A value taht are far from the main set of values

Answer 29

Outliers

Question 30

Dergree of flatness or sharpness of peak of a set of values having a gaussian distribution

Answer 30

Kurtosis

Question 31

Confidence limit applicable

Answer 31

95% (+/-2sd)

Question 32

Control and patient specimen assayed evaluated and reported together

Answer 32

Analytical run

Question 33

Examples of systematic error

Answer 33

``` Trend Outliers Shift 2 2s 4 1s 10x ```

Question 34

Most commonly used patient based qc technique

Answer 34

Delta check

Question 35

Error that cant be easily detected or observed

Answer 35

Random error

Question 36

Error that causes inaccuracy

Answer 36

Systematic error

Question 37

Produces constant difference

Answer 37

Sustematic error

Question 38

Old or contaminated reagents, poor written proceedures, incorect sample and reagent colume

Answer 38

Systematic error

Question 39

Involves proficiency testing program

Answer 39

Interlab

Question 40

Example of random error

Answer 40

Outliers R 4s 1 2s 1 3s